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Thermal reactions of acetonitrile at high temperatures. Pyrolysis behind reflected shocks

✍ Scribed by Assa Lifshitz; Ahuva Moran; Shimon Bidani

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
876 KB
Volume
19
Category
Article
ISSN
0538-8066

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✦ Synopsis

The thermal decomposition of acetonitrile was studied behind reflected shocks in a single pulse shock tube over the temperature range 1350-1950 K at overall densities of approximately 3 x mol/cc. Methane and hydrogen cyanide are the major reaction products. They are formed by an attack of H and CH, radicals on acetonitrile. The initiation step of the pyrolysis is the self dissociation of acetonitrile:

(1) CHsCN -CHZCN + H for which the following rate constant was obtained: k 1 = 6.17 x 101'exp (-96.6 x 103/RT)sec-'. Where R is given in units of cal/K mol. Additional reaction products which appear in the pyrolysis are: C,H,, CzH4, CH2-CHCN, CH=CCN, C2HSCN, C2N2, and C 3 , . Acetylene is formed from methane pyrolysis and becomes a major reaction product at high temperatures. Acrilonitrile and cyanoacetylene are secondary products originating from the C&CN radical. Fhte parameters €or the formation of the reaction products are given.

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